The root beer float is a thing of summertime nostalgia, recalling joyful childhood afternoons, and maybe flashbacks to the lovable and carefree crew of Happy Days. It is also just the kind of fetishized indulgence ripe for a reboot in present-day Seattle, where we adults face social expectations to refine our palates, challenge our taste buds, and immerse ourselves in the world of more “sophisticated desserts.” So it’s no surprise that establishments around the city now offer adult ice cream dessert drinks like craft-beer floats and spirited shakes that showcase the nuances of unexpected flavor pairings—with deliciously whimsical results. […]